Inductor topologies with substantial common-mode and differential-mode inductance

Abstract

An inductor includes a core that has a window ( 164 ). The core includes a first core member and a second core member. A first winding is coupled to the first core member and a second winding is coupled to the second core member. A shell surrounds the core. Pairs of gaps between the core and the shell provide flux paths.

What is claimed is: 
     
       1. A dual mode filtering inductor comprising:
 a continuous core member having a window; 
 a first winding coupled to said continuous core member; 
 a second winding coupled to said continuous core member; 
 a shell surrounding said continuous core member wherein flux circulates through the core and the shell; 
 a first pair of gaps between a lateral member of said continuous core member and said shell; 
 a second pair of gaps between a longitudinal member of said continuous core member and said shell; and 
 wherein the second pair of gaps are larger than the first pair of gaps. 
 
     
     
       2. An inductor as claimed in  claim 1  wherein said shell further comprises a plurality of shell sections having gaps therebetween. 
     
     
       3. An inductor as claimed in  claim 1  wherein said shell further comprises a plurality of shell sections having gaps therebetween.